Jolt: Japan Earthquakes
Earthquakes and shelters
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
JMA reports, tsunami status, automatic alerts, GSI evacuation sites, and a 50-language interface.
Jolt makes published earthquake, tsunami, and evacuation information in Japan easier to read.
AUTOMATIC ALERTS
With notifications allowed, Jolt monitors Japan Meteorological Agency updates even when the app is closed. Choose a minimum Shindo and a monitoring area. Tsunami advisories and warnings are always included. Alerts follow published JMA reports. Jolt is not an Earthquake Early Warning service.
SEE WHAT HAPPENED
View recent JMA earthquake reports on a clear map. Open an event for magnitude, maximum Shindo, depth, origin time, coordinates, and the latest published tsunami status.
FIND AN EVACUATION SITE
Use your location to see nearby evacuation sites published by the Geospatial Information Authority of Japan. Sites designated for tsunami evacuation are marked clearly. Choose a site and open walking directions in Apple Maps.
USE YOUR LANGUAGE
Jolt supports 50 languages for its interface and key safety guidance. It follows your iPhone language by default, and you can choose another language in the app. Remote alert text is currently available in English and Japanese.
WIDGETS AND LIVE ACTIVITIES
Add Home Screen and Lock Screen widgets for recent earthquake status. Eligible alerts can start or update a Live Activity on the Lock Screen and Dynamic Island.
CHECK THE SOURCE
Earthquake and tsunami details link to JMA. Evacuation site information includes its GSI source and designation details when available.
PRIVATE BY DESIGN
Precise location stays on your iPhone. If you enable regional alerts, Jolt sends the selected prefecture, not your coordinates, to its notification service. No account is required. Jolt has no ads and does not track you across apps or websites.
IMPORTANT SAFETY INFORMATION
Jolt is an independent app. It is not affiliated with JMA, GSI, or the Japanese government. Information and notifications can be delayed, incomplete, or unavailable. Do not use Jolt as your only warning system. Follow official emergency alerts and instructions. If you feel strong shaking or are near the coast, move to safety immediately without waiting for an app.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Refreshed the map controls with a cleaner Liquid Glass design and more room for earthquake and shelter information.
Alert preferences, language selection, test alerts, support, and privacy are now together in Settings.
Added an in-app rating prompt and fixed the Rate Jolt link.
The developer, 21 Media, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Other Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 21 Media LLC
- Size
- 7.5 MB
- Category
- Weather
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 48 more
- English, Arabic, Bengali, Burmese, Cambodian, Czech, Danish, Dutch, Filipino, Finnish, French, German, Greek, Gujarati, Hausa, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kannada, Korean, Malay, Malayalam, Marathi, Mongolian, Nepali, Norwegian Bokmål, Persian, Polish, Portuguese, Punjabi, Romanian, Russian, Simplified Chinese, Singhalese, Spanish, Swahili, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Uzbek, Vietnamese
- Age Rating
4+
- 4+
- Copyright
- © 2026 21 Media LLC